1984143 has 8 divisors (see below), whose sum is σ = 3023488. Its totient is φ = 1133784.

The previous prime is 1984139. The next prime is 1984159. The reversal of 1984143 is 3414891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1984143 - 2² = 1984139 is a prime.

It is a Duffinian number.

1984143 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1984143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47221 + ... + 47262.

It is an arithmetic number, because the mean of its divisors is an integer number (377936).

2^1984143 is an apocalyptic number.

1984143 is a deficient number, since it is larger than the sum of its proper divisors (1039345).

1984143 is an equidigital number, since it uses as much as digits as its factorization.

1984143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94493.

The product of its digits is 3456, while the sum is 30.

The square root of 1984143 is about 1408.5961096070. The cubic root of 1984143 is about 125.6582449575.

The spelling of 1984143 in words is "one million, nine hundred eighty-four thousand, one hundred forty-three".